What is the wisdom behind the first address to the believers in the Quran, specifically in Surat Al-Baqarah, beginning with the Quranic command: (O you who have believed, do not say 'Ra'ina' but say 'Undhurna' and listen. And for the disbelievers is a painful punishment), instead of another command? And is this considered among the beauties of the verse?

The reason for prohibiting the believers from saying "Ra'ina" and commanding them to say "Undhurna" is that the Jews distorted the word "Ra'ina" to imply foolishness and recklessness when addressing the Prophet, peace be upon him. Thus, the prohibition came for the believers from using this word to block the path of the Jews. This verse came to guide the believers after their settlement in Medina, to warn them against the cunning of the Jews, to alert them to their deception, and to rouse the spirits of the believers by mentioning their characteristic that they are proud of.